companionate marriage

• <美>试婚； 同居； 友爱婚姻(彼此不承担任何法律义务)

例句

(n)

1. They were cohabiting for three years before their marriage.
   他们同居了三年才结婚。
2. Co-habitation prior to marriage may exert a series of distressing effects.
   未婚同居产生了一系列令人担忧的后果。